生化三答案（Biochemistry three answer）.docVIP

生化三答案（Biochemistry three answer） Biochemistry examination paper (three) First, the noun explanation 1. beta oxidation: fatty acyl coenzyme A in the mitochondria through repeated dehydrogenation, water, dehydrogenation, sulfur dioxide, four steps to produce acetyl coenzyme A. Because oxidation occurs on beta - carbon atoms, it is called beta - oxidation. 2.DNA replication: the process of synthesizing DNA molecules by parental DNA molecules as a template is called DNA replication. Genetic information is passed to offspring by replication. The inevitable loss of water in 3.: the human body can not eat not drinking water under the condition of daily breathing through evaporation, evaporation, the skin with the urine and feces from at least the loss of a certain amount of water, at least in adult 1500ml, said the inevitable loss of body water. 4. alkali storage: sodium bicarbonate in plasma is mainly buffered and fixed acid, which can represent the buffer capacity of the body to the fixed acid, so it is called alkali storage. 5. Michaelis constant: the substrate concentration at which the rate of enzymatic reaction reaches half of the maximum reaction rate. It is the characteristic constant of enzyme, which can represent the affinity between enzyme and substrate. Two. Fill in the blanks 1. normal adult plasma accounts for about 60% of the body weight, and the intercellular fluid accounts for about 15% of the body weight. 2. when the acid poisoning, part of the H+ into exchange with Na+ cells, renal tubular epithelial cells secrete H+ activity H+- Na+ K+- Na+ exchange exchange strengthened, weakened, results can lead to hyperkalemia. 3. the highest transaminase activity in the liver is ALT, whereas the highest transaminase activity in the heart is AST. 4. in DNA replication, synthesis of a chain is continuous, known as the leading chain; the other chain is not continuous, the first synthesis of Okazaki fragments, and then form a complete DNA chain, the chain is called fol